Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 35Get this manual
Secure end caps and starter frame together with thru bolts (a) Testing Motor Armature
CHECKING MOTOR ARMATURE for SHORTS
1Check armature for short circuits, as follows :
aPlace armature in growler and switch growler onbHold hack saw blade over armature core while rotating armaturecIf saw blade vibrates, armature is shortedRecheck after cleaning between commutator barsIf saw blade still vibrates, replace armature
Cleaning and Inspection